US2491042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flying machine, including features of a helicopter and an autogiro
Assignee: Individual
•
Filing: 1946-11-07
•
Granted: 1949-12-13
•
Expires: 1966-11-07
Abstract
No abstract record available.
Inventors
- 👤 Hayot Louis Adolphe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:13
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1820946A
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US1897092A
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US1955921A
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US2380580A
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US1986709A
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US2030578A
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US2226978A
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US2076327A
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US2048950A
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US2172334A
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US2135073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |